1,708 research outputs found
T.J. Stiles: “The Commodore’s Patriotism: Cornelius Vanderbilt’s Path to the Founding of Vanderbilt University”
No full textIncludes descriptive metadata provided by producer in MP4 file: "Chancellor's Lecture Series - Videos - T.J. Stiles: 'The Commodore’s Patriotism: Cornelius Vanderbilt’s Path to the Founding of Vanderbilt University'." By Vanderbilt University. T.J. Stiles, Pulitzer Prize-winning author and historian, speaks Sept. 29, 2010 as part of the Chancellor's Lecture Series. Stiles wrote the 2009 biography The First Tycoon: The Epic Life of Cornelius Vanderbilt. Chancellor Nicholas Zeppos introduces Stiles. Stiles takes questions after his lecture
Cwbr Author Interview: Custer\u27s Trials: A Life On The Frontier Of A New America
No full textInterview with T.J. Stiles, author of Custer\u27s Trials: A Life on the Frontier of a New America Interviewed by Tom Barber
Civil War Book Review (CWBR): The Civil War Book Review is pleased to speak with T.J. Stiles, winner of multiple awards for biography and author of Jesse James: Last Rebel of the Civil War and The First Tycoon: The Epic Life of Cornelius Vanderbilt. Today we get to discuss his most recent work Custer\u27s Trials: A Life on the Frontier of a New America. Mr. Stiles, thank you for joining us today. T.J. Stiles: Thanks very much for interviewing me...
Flow patterns around longitudinal training dams
No full textWith the intention to reduce the negative effects of ongoing bed erosion, as well as to improve several other river functions such as protection against floods, provision of safe and efficient navigation and ecology, a ‘pilot project longitudinal training dams’ was initiated. The training dams have recently been implemented in the Waal between Tiel and Sind Andries. In this project, river groynes have been completely removed and replaced by dams that lie parallel to the river bank. With help of the longitudinal training dams, a two-channel river system is created in which the river is divided into a main and side channel. The dams are placed in a continuous manner with openings in between that are relatively small compared to the dam length. At the beginning and end of the dam an inlet and outlet region is situated, as shown in Fig. 1. The combination of inlet and openings allows for water and sediment to be divided between the main and the side channel. Both inlet and openings are constructed with the help of a porous rock-layer. The crest heights can be altered by adding or removing stones. This is expected to influence the amount of water and sediment entering the side channel and can therefore be used as a regulation tool. A.J.F. Hoitink, T.V. de Ruijsscher, T.J. Geertsema, B. Makaske, J. Wallinga, J.H.J. Candel, J. Poelman (Eds.) NCR days 2017, Febr. 1-3, 2017. Book of abstracts, NCR publication 41-2017.Rivers, Ports, Waterways and Dredging EngineeringHydraulic Structures and Flood RiskEnvironmental Fluid Mechanic
Seismic interferometry as a tool for improved imaging of the heterogeneities in the body of a landfill
No full textAccepted Author ManuscriptGeo-engineeringApplied Geophysics and Petrophysic
On the dynamics of hydraulic lines supplying servosystems
No full textMechanical, Maritime and Materials Engineerin
Das hydrostatische Keilspaltlager: Berechnung und Anwendung bei Hydrozylindern
No full textMechanical, Maritime and Materials Engineerin
Azomethine-based Donor Materials for Organic Solar Cells
No full textSolution processable organic photovoltaics (OPVs) are attracting much attention because of their anticipated advantages such as low cost, flexibility, lightweight, and the potential to be produced on a large scale. The photoactive layer of OPVs consists of a blend of an electron donating and an electron accepting material. Over the last 20 years, a plethora of (record breaking) electron?donating materials have been reported, which are mostly synthesized via transition metal mediated aryl?aryl coupling reactions. These chemistries, however, make use of expensive metal catalysts, inert reaction conditions and require time?consuming product purification steps. In order to offer a more economic route towards OPVs we have explored novel conjugated azomethine?based (–N=CH–) donor materials and the initial results are presented in this thesis. The azomethine bond is isoelectronic to the vinyl bond (–CH=CH–) and displays similar optoelectronic and thermal properties. In addition, azomethines offer significant advantages over vinylenes as they can be prepared using Schiff base condensation chemistry under near ambient reaction conditions. Expensive catalysts are not required and water is the only by?product. The main objective of this research is to explore the use of azomethine?based donor materials in bulk heterojunction solar cells. The design and synthesis of azomethine?based polymers, (hyper?branched) oligomers, small?molecules (both linear and star?shaped) and their performance in photovoltaic devices will be presented in this thesis.Aerospace Structures and MaterialsAerospace Engineerin
Do X-ray binary spectral state transition luminosities vary?
No full textWe tabulate the luminosities of the soft-to-hard state transitions of all X-ray binaries for which there exist good X-ray flux measurements at the time of the transition, good distance estimates, and good mass estimates for the compact star. We show that the state transition luminosities are at about 1-4% of the Eddington rate, markedly smaller than those typically quoted in the literature, with a mean value of 2%. Only the black hole candidate GRO J 1655-40 and the neutron star systems Aql X-1 and 4U 1728-34 have measured state transition luminosities inconsistent with this value at the 1sigma level. GRO J 1655-40, in particular, shows a state transition luminosity below the mean value for the other sources at the 4sigma level. This result, combined with the known inner disk inclination angle (the disk is nearly parallel to the line of sight) from GRO J 1655-40's relativistic jets suggest that the hard X-ray emitting region in GRO J 1655-40 can have a velocity of no more than about beta =0.68, with a most likely value of about beta =0.52, and a minimum speed of beta =0.45, assuming that the variations in state transition luminosities are solely due to relativistic beaming effects. The variance in the state transition luminosities suggests an emission region with a velocity of ~ 0.2c. The results are discussed in terms of different emission models for the low/hard state. We also discuss the implications for measuring the dimensionless viscosity parameter alpha . We also find that if its state transitions occur at typical luminosities, then GX 339-4 is likely to be at a distance of at least 7.6 kpc, much further than typically quoted estimates
Design and Properties of SWCNT-Polyetherimide Nanocomposites
No full textThe main objective of the research presented in the thesis is to explore non-functionalized single-walled carbon nanotubes (SWCNTs) as reinforcing nanofiller in all-aromatic thermoplastic poly(etherimide)s. The role of polymer geometry and how this affects the morphological and thermo-mechanical properties of the SWCNT-PEI nanocomposites were investigated. The inclusion of SWCNTs in aBPDA-P3, an amorphous non-linear polyetherimide matrix had no effect on the morphology and thermo-mechanical properties of the matrix. In ODPA-P3, a more linear amorphous polyetherimide matrix, the SWCNTs act as a nucleating agent with the polymer crystallinity increasing linearly with SWCNT content to 45% (at 2.4 vol.% SWCNT). TEM measurements showed that the SWCNTs become embedded within the crystal lattice of the polymer matrix. The result is a significant increase in thermo-mechanical properties; the storage modulus (E’) above Tg increased by a factor 105 GPa and the elastic modulus from stress-strain measurements increased with a reinforcement efficiency (dY/dVf) of 170 GPa. Our findings show that the polyetherimide backbone geometry determines whether the polymer is good host for SWCNTs. To investigate the role of polymer morphology on the final nanocomposite properties, we compared SWCNT nanocomposites based on amorphous ODPA-P3 with that of a semi-crystalline BPDA-P3. In semi-crystalline BPDA-P3, the SWCNTs were found to exist within the amorphous domains of the BPDA-P3 matrix. Using the Halpin-Tsai equation, the effective SWCNT modulus was found to be ~100 GPa which is significantly lower than the 640 GPa obtained for ODPA-P3 SWCNT. By application of an isothermal step above the Tm of the nanocomposites during imidization, the conversion of the crystalline ordering around the CNT to an amorphous morphology in ODPA-P3 results in a significant reduction in the reinforcement efficiency, i.e. from 170 GPa to 30 GPa. The reinforcement efficiency for semi-crystalline and amorphous BPDA-P3 nanocomposites remains constant at 30 GPa. By comparing reinforcement efficiencies of ODPA-P3 with SWCNTs residing in contrasting morphologies, we have shown that having a crystalline-SWCNT interface is critical in obtaining nanocomposites with improved thermo-mechanical performance over the neat polymer. We have also compared ODPA-P3 nanocomposites based on 0-D fullerenes (C60) with 1-D SWCNTs. The inclusion of C60 in ODPA-P3 induces crystallization (40% at 0.6 vol.%) of the polymer matrix. At 40% crystallinity, the E’ above Tg in ODPA-P3 C60 is a mere 0.01 GPa, which is substantially lower than the 1.2 GPa observed in the ODPA-P3 SWCNT nanocomposite. By comparing mechanical property improvements as a function of crystal content in the matrix, the elastic modulus of nanocomposites with 100% crystal content could be calculated and was found to be 5.8 GPa for ODPA-P3 C60 and 10.4 GPa for ODPA-P3 SWCNT. The presence of the cylindrical crystalline coating around the CNT was found to aid in stress-transfer from the matrix to the SWCNTs.Novel Aerospace MaterialsAerospace Engineerin
The shade of Alexander Pope on the banks of the Thames. [electronic resource] : A satirical poem. With notes. Occasioned chiefly, but not wholly, by the residence of Henry Grattan, Ex-Representative in Parliament for the City of Dublin, at Twickenham, in November, 1798. By the author of The pursuits of literature.
No full textThe author of The pursuits of literature = T.J. Mathias.With a half-title.Electronic reproduction.English Short Title Catalog,Reproduction of original from British Library
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